Pump-diaphragm.



- Patented August ao, 1904.

1UNrrar) STATES l,laiENT OFFICE.

Eems GEORGE, Je.; or New Yoan, N. Y.

PUmP-DiAPHRAGM.

SPECIFICATION forming part of 4Iliietters Patent No. 768,984, datedAugust 30, 1994.

weeen nea February 5,1904. serial no. 192,128. nu modem To JJ whom. itinnig; fonzlrn:

Be it known that LEDwrS (rxiRGl-:,Jr.,aciti zen of the United States.and a residentof the city of New York, borough of Brooklyn, in thecounty of Kings and State of New York, have invented a new and improvedPump Diaphragm, of which the following is a full, clear, and exactdescription.A I

The purpose of the invention is to provide a diaphragm for pumps inwhich a flexible material is used between the upper and lower rubbersections of the diaphragm, which intermediate material is non-porous andserves to more or less stiten the outer members or sections, therebygreatly adding to the lifetime of the diaphragm as a whole and rendering it much more serviceable than similar dia# phragms for the samepurpose.

.The invention consists in the novel con-2 struction and combination ofthe several parts, as will be hereinafter full) set forth, and point edout in the claims.

Reference is to be had Ito the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both the figures.

Figure] is a plan View of the improved diaphragm with parts broken away,and Fig. 2 is a section taken on the line 2 2 of Fig. 1.

The pump-diaphragm is of the usual for mation or may be given anydesired shape, and consists, as customary, of an outer member A` ofrubber,'and an inner member B, of similar material; but heretoforecanvas has been introduced Vbetween these two members; but said canvassoon dcterioxates'under the conditions of usage. and thereby renders thediaphragm practically useless in a comparatively short space of time-.Instead of using canvas as the intermcdium .i employ a rawhide member C,which is made to vconform practically to the conformation of the outerand the vinner members A vand B. This rawhide intermediate member C isnon-porous and will withstand a great amount of pressure, andconsequently adds. materially to the strength of the body, of thediaphragm namely. the outer and the innersections,` aber referred to.This intermediate rawhide se tion C is cemented in any suitable orapprove manner to the outer and lthe inner rubber-r elastic sections ormembers A and B. and

order that the edge of the intermediate se tion shall lbe properlprotected an annule flange it* is formed at the marginof the outA memberC of the diaphragm, as is .shown Fig. 2, and this flange 10 is cemvniedor otherwise securely fastened to the margin portion or the inner orlower member B, al the said marginal portion of the lower vor i nermember B may be and preferably is mo or less thickened, so as to givestability to tl marginai portion of the diaphragm as a who] Under' theforegoing construction it is o vious that the rawhide intermediatesection accomplishes greater result-s than the custo] ary intermediatecanvas Section, as the sa intermediate rawhide section adds to the slbility 'of the outer and inner rubber `sectie and serres to prolong thelifetime there without in any material sense lesseningt pliability ofthe diaphragm as a. whole.

Havingthus described my invention, I cla as new and desire to secure byLetters Patent 1. A pump-diaphragm, consisting of outer andan innermember of rubber, and intermediate member of rawhide, as set forl 2. Apump-diaphragm, consisting of outer and an inner member of rubber andintermediate member of rawhide, which' tex-mediate member is securedtothe outerla the inner members', and a protective flange the outermargin of one of the rubber me bers, which protective flange guards themginal portion of the intermediate or rawh member. as described. f

1n testimony whereof I havesigned myna to this Specification in thepresence of twos` scribing witnesses.

EDXVIN GEORGPL'JB Y 'itnscs: y

.inns l. liasses, WILLIAM DUFFY.

